2 * drivers/video/tx3912fb.c
4 * Copyright (C) 1999 Harald Koerfgen
5 * Copyright (C) 2001 Steven Hill (sjhill@realitydiluted.com)
7 * This file is subject to the terms and conditions of the GNU General Public
8 * License. See the file COPYING in the main directory of this archive for
11 * Framebuffer for LCD controller in TMPR3912/05 and PR31700 processors
13 #include <linux/config.h>
14 #include <linux/module.h>
15 #include <linux/kernel.h>
16 #include <linux/errno.h>
17 #include <linux/string.h>
18 #include <linux/tty.h>
19 #include <linux/delay.h>
20 #include <linux/interrupt.h>
21 #include <linux/init.h>
25 #include <asm/bootinfo.h>
26 #include <asm/uaccess.h>
27 #include <asm/tx3912.h>
28 #include <video/tx3912.h>
31 * Frame buffer, palette and console structures
33 static struct fb_info fb_info;
36 static struct fb_fix_screeninfo tx3912fb_fix __initdata = {
38 #ifdef CONFIG_NINO_16MB
39 .smem_len = (240 * 320),
41 .smem_len = ((240 * 320)/2),
43 .type = FB_TYPE_PACKED_PIXELS,
44 .visual = FB_VISUAL_TRUECOLOR,
48 .accel = FB_ACCEL_NONE,
51 static struct fb_var_screeninfo tx3912fb_var = {
56 #ifdef CONFIG_NINO_16MB
58 .red = { 5, 3, 0 }, /* RGB 332 */
63 .red = { 0, 4, 0 }, /* ??? */
67 .activate = FB_ACTIVATE_NOW,
77 .vmode = FB_VMODE_NONINTERLACED,
81 * Interface used by the world
83 int tx3912fb_init(void);
85 static int tx3912fb_setcolreg(u_int regno, u_int red, u_int green,
86 u_int blue, u_int transp,
87 struct fb_info *info);
92 #define get_line_length(xres_virtual, bpp) \
93 (u_long) (((int) xres_virtual * (int) bpp + 7) >> 3)
96 * Frame buffer operations structure used by console driver
98 static struct fb_ops tx3912fb_ops = {
100 .fb_setcolreg = tx3912fb_setcolreg,
101 .fb_fillrect = cfb_fillrect,
102 .fb_copyarea = cfb_copyarea,
103 .fb_imageblit = cfb_imageblit,
104 .fb_cursor = soft_cursor,
107 static int tx3912fb_check_var(struct fb_var_screeninfo *var, struct fb_info *info)
113 get_line_length(var->xres_virtual, var->bits_per_pixel);
114 if ((line_length * var->yres_virtual) > info->fix.smem_len)
120 static int tx3912fb_set_par(struct fb_info *info)
122 u_long tx3912fb_paddr = 0;
124 /* Disable the video logic */
125 outl(inl(TX3912_VIDEO_CTRL1) &
126 ~(TX3912_VIDEO_CTRL1_ENVID | TX3912_VIDEO_CTRL1_DISPON),
130 /* Set start address for DMA transfer */
131 outl(tx3912fb_paddr, TX3912_VIDEO_CTRL3);
133 /* Set end address for DMA transfer */
134 outl((tx3912fb_paddr + tx3912fb_fix.smem_len + 1), TX3912_VIDEO_CTRL4);
136 /* Set the pixel depth */
137 switch (info->var.bits_per_pixel) {
140 outl(inl(TX3912_VIDEO_CTRL1) &
141 ~TX3912_VIDEO_CTRL1_BITSEL_MASK, TX3912_VIDEO_CTRL1);
142 info->fix.visual = FB_VISUAL_MONO10;
146 outl(inl(TX3912_VIDEO_CTRL1) &
147 ~TX3912_VIDEO_CTRL1_BITSEL_MASK, TX3912_VIDEO_CTRL1);
148 outl(inl(TX3912_VIDEO_CTRL1) |
149 TX3912_VIDEO_CTRL1_BITSEL_4BIT_GRAY,
151 info->fix.visual = FB_VISUAL_TRUECOLOR;
155 outl(inl(TX3912_VIDEO_CTRL1) &
156 ~TX3912_VIDEO_CTRL1_BITSEL_MASK, TX3912_VIDEO_CTRL1);
157 outl(inl(TX3912_VIDEO_CTRL1) |
158 TX3912_VIDEO_CTRL1_BITSEL_8BIT_COLOR,
160 info->fix.visual = FB_VISUAL_TRUECOLOR;
165 outl(inl(TX3912_VIDEO_CTRL1) &
166 ~TX3912_VIDEO_CTRL1_BITSEL_MASK, TX3912_VIDEO_CTRL1);
167 outl(inl(TX3912_VIDEO_CTRL1) |
168 TX3912_VIDEO_CTRL1_BITSEL_2BIT_GRAY,
170 info->fix.visual = FB_VISUAL_PSEUDOCOLOR;
174 /* Enable the video clock */
175 outl(inl(TX3912_CLK_CTRL) | TX3912_CLK_CTRL_ENVIDCLK,
178 /* Unfreeze video logic and enable DF toggle */
179 outl(inl(TX3912_VIDEO_CTRL1) &
180 ~(TX3912_VIDEO_CTRL1_ENFREEZEFRAME |
181 TX3912_VIDEO_CTRL1_DFMODE)
182 , TX3912_VIDEO_CTRL1);
185 /* Enable the video logic */
186 outl(inl(TX3912_VIDEO_CTRL1) |
187 (TX3912_VIDEO_CTRL1_ENVID | TX3912_VIDEO_CTRL1_DISPON),
190 info->fix.line_length = get_line_length(var->xres_virtual,
191 var->bits_per_pixel);
195 * Set a single color register
197 static int tx3912fb_setcolreg(u_int regno, u_int red, u_int green,
198 u_int blue, u_int transp,
199 struct fb_info *info)
205 ((u32 *)(info->pseudo_palette))[regno] = ((red & 0xe000) >> 8)
206 | ((green & 0xe000) >> 11)
207 | ((blue & 0xc000) >> 14);
211 int __init tx3912fb_setup(char *options);
214 * Initialization of the framebuffer
216 int __init tx3912fb_init(void)
218 u_long tx3912fb_paddr = 0;
219 int size = (info->var.bits_per_pixel == 8) ? 256 : 16;
222 if (fb_get_options("tx3912fb", &option))
224 tx3912fb_setup(option);
226 /* Disable the video logic */
227 outl(inl(TX3912_VIDEO_CTRL1) &
228 ~(TX3912_VIDEO_CTRL1_ENVID | TX3912_VIDEO_CTRL1_DISPON),
232 /* Set start address for DMA transfer */
233 outl(tx3912fb_paddr, TX3912_VIDEO_CTRL3);
235 /* Set end address for DMA transfer */
236 outl((tx3912fb_paddr + tx3912fb_fix.smem_len + 1), TX3912_VIDEO_CTRL4);
238 /* Set the pixel depth */
239 switch (tx3912fb_var.bits_per_pixel) {
242 outl(inl(TX3912_VIDEO_CTRL1) &
243 ~TX3912_VIDEO_CTRL1_BITSEL_MASK, TX3912_VIDEO_CTRL1);
244 tx3912fb_fix.visual = FB_VISUAL_MONO10;
248 outl(inl(TX3912_VIDEO_CTRL1) &
249 ~TX3912_VIDEO_CTRL1_BITSEL_MASK, TX3912_VIDEO_CTRL1);
250 outl(inl(TX3912_VIDEO_CTRL1) |
251 TX3912_VIDEO_CTRL1_BITSEL_4BIT_GRAY,
253 tx3912fb_fix.visual = FB_VISUAL_TRUECOLOR;
254 tx3912fb_fix.grayscale = 1;
258 outl(inl(TX3912_VIDEO_CTRL1) &
259 ~TX3912_VIDEO_CTRL1_BITSEL_MASK, TX3912_VIDEO_CTRL1);
260 outl(inl(TX3912_VIDEO_CTRL1) |
261 TX3912_VIDEO_CTRL1_BITSEL_8BIT_COLOR,
263 tx3912fb_fix.visual = FB_VISUAL_TRUECOLOR;
268 outl(inl(TX3912_VIDEO_CTRL1) &
269 ~TX3912_VIDEO_CTRL1_BITSEL_MASK, TX3912_VIDEO_CTRL1);
270 outl(inl(TX3912_VIDEO_CTRL1) |
271 TX3912_VIDEO_CTRL1_BITSEL_2BIT_GRAY,
273 tx3912fb_fix.visual = FB_VISUAL_PSEUDOCOLOR;
274 tx3912fb_fix.grayscale = 1;
278 /* Enable the video clock */
279 outl(inl(TX3912_CLK_CTRL) | TX3912_CLK_CTRL_ENVIDCLK,
282 /* Unfreeze video logic and enable DF toggle */
283 outl(inl(TX3912_VIDEO_CTRL1) &
284 ~(TX3912_VIDEO_CTRL1_ENFREEZEFRAME | TX3912_VIDEO_CTRL1_DFMODE),
288 /* Clear the framebuffer */
289 memset((void *) tx3912fb_fix.smem_start, 0xff, tx3912fb_fix.smem_len);
292 /* Enable the video logic */
293 outl(inl(TX3912_VIDEO_CTRL1) |
294 (TX3912_VIDEO_CTRL1_ENVID | TX3912_VIDEO_CTRL1_DISPON),
300 tx3912fb_fix.line_length =
301 get_line_length(tx3912fb_var.xres_virtual, tx3912fb_var.bits_per_pixel);
302 if ((tx3912fb_fix.line_length * tx3912fb_var.yres_virtual) > tx3912fb_fix.smem_len)
305 fb_info.fbops = &tx3912fb_ops;
306 fb_info.var = tx3912fb_var;
307 fb_info.fix = tx3912fb_fix;
308 fb_info.pseudo_palette = pseudo_palette;
309 fb_info.flags = FBINFO_DEFAULT;
311 /* Clear the framebuffer */
312 memset((void *) fb_info.fix.smem_start, 0xff, fb_info.fix.smem_len);
315 fb_alloc_cmap(&info->cmap, size, 0);
317 if (register_framebuffer(&fb_info) < 0)
320 printk(KERN_INFO "fb%d: TX3912 frame buffer using %uKB.\n",
321 fb_info.node, (u_int) (fb_info.fix.smem_len >> 10));
325 int __init tx3912fb_setup(char *options)
329 if (!options || !*options)
332 while ((this_opt = strsep(&options, ","))) {
333 if (!strncmp(options, "bpp:", 4))
334 tx3912fb_var.bits_per_pixel = simple_strtoul(options+4, NULL, 0);
339 module_init(tx3912fb_init);
340 MODULE_LICENSE("GPL");